answer questions 3 and 4 not the one from the problem

ance of 15 percent of job time. 10. The data in the following table represent time study observations for a woodworking operation. 2. Based on the observations, determine the standard time for the operation, assuming an allow b. How many observations would be needed to estimate the mean time for element 2 within percent of its true value with a 95.5 percent confidence? c. How many observations would be needed to estimate the mean time for element 2 within 01 minute of its true value with a 95.5 percent confidence? OBSERVATIONS (minutes per cycle) Performance Rating 1 2 3 4 5 6 Element 1.20 1.16 1.24 110% 1.15 1 1.17 0.87 0.83 0.78 115 1.22 0.82 0.59 2 0.85 0.60 1.32 0.54 0.58 0.53 0.52 105 3 3 "Unusual delay, disregard time. QUESTION 3 Chapter 7. Problem 10 Assuming an allowance of 15 percent of job time, what is the standard time for element based on the observations (Please keep 3 digits after the decimal point) QUESTION 4 Chapter 7. Problem 10 How many observations would be needed to estimate the mean time for element 2 within 1 percent of its true value with a 95.5 percent confidence? (Use Z value on page 314 table.) O45 O 66 68